<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Guestbook</title>
    <style>
    body {{
        max-width:95%;
        margin:auto;
    }}
   .container {{
        border:1px solid red;
    }}
    </style>
  </head>
  <body>
  <main>
  {content}
  </main>
  </body>
</html>
